Final answer:
Option B). The experimental probability that the book randomly drawn from the shelf next time will be for grade 3 is 1/3.
Step-by-step explanation:
We must know the total number of books as well as the number of grade 3 books that are on the shelf in order to calculate the experimental chance that the book that is randomly selected from the shelf the following time will be for that grade. Assume there are five grade 3 books and fifteen total. The number of intended outcomes (grade 3 books) divided by the total number of possible outcomes (books) yields the experimental probability. The experimental probability in this instance is 5/15, which can be simplified to 1/3.